Ore-stamp-mill mortar.



P. N. NISSBN.

ORE STAMP MILL MORTAR.

APPLICATION FILED SEPT. 28, 1904.

Patented J an. 4, 1910.

UNITED STATES PATENT OFFICE.

PETER N. NISSEN, OF LOS ANGELES, CALIFORNIA, ASSIGNOR TO THE NISSENENGINEER- ING COMPANY, A CORPORATION OF ARIZONA TERRITORY.

ORE- STAMP-MILL MORTAR.

To all whom it may concern:

Be it known that I, PETER N. NIssnN, a citizen of the United States, anda resident of Los Angeles, in the county of Los Angeles and State ofCalifornia, have invented certain new and useful Improvements inOre-Stamp-Mill Mortars, of which the following is a specification.

My invention relates to improvements in the mortars of stamp millsadapted to be used for crushing quartz and extracting precious metalstherefrom.

It relates particularly to the portions of the mortar wherein thecrushing or pulverizing operation takes place and is in the nature of animprovement on the device shown in my Patent No. 77 6,414..

The objects of my invention, among others, are to render the partseasily adjustable to different conditions and adapted to be renewedwithout disturbing the other parts of the machine.

As a rule stamp mills of this character are used in places where thefacilities for reairin machiner or reconstructin arts t 6 thereof areextremely limited; and when it becomes necessary to reconstruct orrepair a mill, or any part thereof, serious delay and considerableexpense are often caused, not only reducing the output of the mill butsometimes compelling the entire mining plant to remain idle for a veryconsiderable period, and thus causing a. serious loss of labor. It willbe apparent therefore that one of the greatest necessities in machineryof this kind is to have the parts of the mortar readily adjustable andrenewable, without the necessity of employing skilled mechanical laboror machinery. It is with these considerations in view that the mortarembodying my invention has been designed.

The invention consists of the combination of parts and arran ement ofdetails hereinafter described and claimed and illustrated in theaccompanying drawings.

In the said drawings Figure 1 is a horizontal section of a mortarembodying my improvements, the upper half on the line y-3 of Fig. 2 andthe lower half on the line z--z of Fig. '2. Fig. 2 is a vertical sectionof the same on the line w-w of Fig. 1.

The base of the mortar H is circular in form and extends a suitabledistance beyond the vertical walls thereof. The walls H of Specificationof Letters Patent.

Application filed September 28, 1904.

Patented J an. 4, 1910. Serial No. 226,274.

the mortar proper are substantially cylindrical, and the cavity withinwhich the ore is crushed is of inverted cone frusturn form. The walls ofthis cavity are provided with a suitable lining I, preferably ofhardened steel, to resist the wear of the ore while being crushed onthedies. This lining conforms to the shape of the integral portions of themortar walls by having its forward portion cut away, and the lowerportion I extended to the upper edge of the cutaway portion of themortar wall only. An annular flange I extends from the lower edge of thelining I and is adapted to fill the bottom of the mortar cavity betweenthe side walls and the circular table H. The table H extends a shortdistance from the bottom of the mortar and is provided withacentral bossH adapted to enter the recess K in the false bottom K, and thus hold thefalse bottom in position. The said false bottom is of greater diameterthan the table H, so that its edges will extend beyond said table andoverlap the flange I of the lining, thus holding the said lining inposition. The false bottom K in turn has a central boss K adapted toengage the recess J in the bottom of the die J. An elongated opening Kextends through the boss K to the circular recess K", which is somewhatdeeper than the boss engaging it, thereby leaving a cavity above theupper surface of said boss. The object of this arrangement is to providea convenient means for removing the false bottom. It will be seen thatby inserting an L- or T-shaped hook through the openingK into the recessK and turning it, a ready means of removing the said false bottom isobtained. The die J is held in position by the engagement of its centralrecess J with the boss K and has a flange J at its lower edge extendingto the edge of the false bottom. It will be observed that the sides ofthe die are substantially vertical, and the walls of the mortar beinginclined outwardly from bottom to top therefore provide an annularspace, narrowing from top to bottom between the die and the said mortarwalls.

The mortar is provided with an inlet A for ore and water, an outlet C,provided with a screen C, and has a cylindrical upper portion B adaptedto allow the reciprocation of the stamp stem therein. The outlet Cpreferably extends more than half way around the circumference of themortar, and the screen C is held in position, covering this outlet, bystrips D extending along its upper and lower edges, secured to the sideflanges E by means of a metallic strip D secured to the strip D andhaving screw bolts D at both ends, which extend through the said sideflange and are retained by nuts D threaded On their outer ends. Thestrip D is preferably made of wood, or other comparatively softmaterial, so that it will securely hold the screen against slipping whenpressed against the same by the tightening of the strip or band D. Inthis manner the screen is securely held between the retaining strips andthe edges of the discharge openm 1 table E, preferably cast integralwith the mortar walls, extends around the lower edge of the dischargeopening and is provided with vertical sides E running from the frontedge of the table to the side flanges E and by this means the product ofthe mortar is caused to flow out over the outer edge of the table.

In order to adjust the height of the lower edge of the dischargeopening-and for other purposes-I have provided the removable segmentalblock G, which rests upon the step H of the upper edge of the verticalmortar wall at its cut-away portion. This block G has a tongue G runningalong its top, which tongue has its outer vertical face back of theouter surface of the block, so that the lower edge of the screen and thescreen-retaining strips may rest upon the upper surface of said blockand the screen be held between the tongue G and the retaining stripwhich also assists in holding the upper part of the block in position.The inner surface of the tongue G is curved to receive the curved upperportion of the plate or metallic lining F, which lining covers the innersurface of the block. The lower surface of the block is also providedwith a tongue, G adapted to be held on the stepped portion H by the bandL, which is in all respects similar to the strip or band D, and securedto the side flange of the mortar in the same manner. By employing theblock G the height of the discharge opening may be adjusted to theheight of the die J, as the said. die wears down in use, and thus thesaid discharge opening will always be in the same relative position tothe top of the die. It will be understood that, for the purpose ofmaking such adjustment, blocks of various heights are provided, and alsothat the operation of removing one block, and replacing it with another,can be quickly and easily accomplished. This arrangement renders itunnecessary tomove the die at all as it wears down; and when the diebecomes worn down below the step H the block may be dispensed with, andthe lower edge of the screen secured to the said step H direct.

It will be understood also that screens of different widths must be usedto cover the discharge opening when made adjustable by the use of theblocks G, or a screen used which is wider than the opening as shown inthe drawings, and in this latter instance the screen, when the openingis comparatively narrow, may be allowed to extend above the upper edgeof said opening. \Vith this latter arrangement. the screen may beadjusted vertically without detaching it from the mortar by simplyloosening the retaining band.

hat I claim as new is 1. In a device of the character described, thecombination of an interior removable lining covering the walls of themortar, an inwardly extending flange at the lower edge of said lining, adie resting in the mortar, the edges of which extend laterally beyondthe inner edge of said flange, a recess in the bottom of said die and aremovable part secured on the bottom of the mortar and adapted to engagesaid recess.

2. In a device of the character described, the combination of aninterior lining, an inwardly extending flange at the lower edge of saidlining, a table in the bottom of said mortar raised a distance equal tothe thickness of said flange, a false bottom on said table extendingbeyond the same and overlapping said flange, a central boss on the tableand a central recess of greater depth than the thickness of the boss isthe false bottom adapted to receive said boss, said false bottom havingan elongated opening extending from the said recess therethrough, acentral boss in the upper surface of the false bottom, a die restingupon said false bottom and a central recess therein adapted to receivethe boss in the false bottom.

3. The combination of a die resting on the bottom of the mortar, wallshaving an inlet for ore and an outlet opening for the product of themortar above said die, a screen covering said outlet opening, aremovable block extending along the lower edge of the outlet, a metalliclining on the inner'side of said block extending from the opening to thelevel of the die and an interior lining of the mortar meeting the loweredge of the said block lining.

4. In a device of the character described, the combination of acylindrical mortar, walls having inlet and outlet openings therein, asegmental detachable block partly closing the lower part of the outletopening, a metallic lining on the inner side of said block and aninterior lining of the mortar meeting the lower edge of the said blocklining.

5. The combination of a mortar wall having an inlet opening for ore andan outlet low the said openings, a screen covering said outlet opening,a removable block extending along the lower edge of the outlet, meansfor securing the upper edge of'the screen, and means for securing thelower ed e of the screen constructed to be detachable without removingthe means for securing the upper edge, and to assist in holding theremovable block in position.

6. The combination of a mortar wall having an inlet opening for ore andan outlet opening for the crushed product, a die below the saidopenings, an adjustable screen covering said outlet opening, a removableblock extending along the lower edge of the outlet, means for securingthe lower edge of i the screen, and means for securing the upper edge ofthe screen, detachable therefrom and constructed to permit of verticaladj ustment of the screen without detachment of the last named securingmeans from the mortar.

7. The combination of a mortar, Walls having inlet and outlet openingstherein, a

opening for the crushed product, a die bei inwardl extending flange atthe lower edge of said ining, a die supported in the mortar andoverlapping said flange, and means for holding the said die againstlateral movement and entirely out of contact with the side walls of themortar.

9. In combination with a substantially cylindricalvmortar having wallsprovided with an outlet opening, a segmental block extending along thelower edge of said outlet opening and seated on the mortar wall, a metalband extending around the outside of and normally in contact with butdisconnected from said segmental block, and adjustable means connectingsaid band with the mortar at the ends of said lower edge of the opening.

10. In a mortar, the combination of an internal lining covering thewalls of the mortar, an inwardly extending flange at the lower edge ofsaid linin a table in the bottom of the mortar raise a distance equal tothe thickness of said flange, a false bottom on said table extendinglaterally beyond the same and overlapping said flange, and a die restingon said false bottom, the false bottom having a recess in its bottom toreceive a corresponding boss on the table and the die having a recess inits bottom to receive a corresponding boss on the false bottom.

Witness my hand this 19th day of September, 1904i.

PETER N. NISSEN.

\Vitnesses:

R. J. ADCOGK, T. D. REYMERT.

